Laboratory heavy liquid separation tests recovered 95% of the total rare earth oxide ('TREO') in 45% of the mass of a deslimed feed sample
Preliminary locked-cycle flotation tests yielded a concentrate containing 48% TREO at 73% recovery
Two preliminary caustic cracking/acid leach tests on a 45% TREO flotation concentrate extracted 87% and 78% TREO.
Appia will be conducting further laboratory testwork and expects improved flotation performance and in excess of 90% REE extraction from concentrates.
Preliminary data results show that the gallium concentration follows the rare earths through the beneficiation process and reports to the concentrate.
Appia President
As announced in a News Release dated
Experimental work commenced in
Most of the experimental effort was spent on froth flotation. Numerous factors were investigated including grind size, slimes removal, regrind, circuit configuration, and reagents. The circuit and procedure that was developed included a grind to 80% passing 106 -microm, no desliming, oleic acid collector with sodium silicate as a gangue depressant in roughing and initial cleaning, and with reverse cleaning final stages. This was tested in preliminary locked cycle tests and shown to deliver a concentrate containing 48% TREO at 73% recovery. Additional beneficiation work is planned to confirm and improve upon these initial test results. Beneficiation tests are also planned for new samples representing other mineralized zones of the
Two preliminary caustic crack tests were performed on a lower grade flotation concentrate generated early in the beneficiation program and containing 45.5% TREO. Test CC-1 was done on the as-received flotation concentrate, test CC-2 on the same concentrate after grinding to pass 45 -microm. Each caustic crack residue was leached with HCl acid. TREO extractions in these two preliminary tests were 87% and 78% respectively. It is fully expected that recoveries in the excess of 90% will be attained with further testing on higher grade flotation concentrates.
ALCES LAKE HIGH-GRADE REE PROJECT
Appia drilled a total of 100 core holes and collected approximately 8,075 meters of diamond drill core in its 2021 drilling program. Initial assay results from the Wilson North and Richards drill holes were announced on
With the largest exploration and diamond drilling program in the Company's history completed, exploration results will be released as received and analyzed by the company. Analysis of the summer exploration and drilling program will follow and may lead to the preparation of an NI 43-101 (Technical Report with 3D Geophysical-geological Models) report expected in 2022.
Critical rare earth elements are defined here as those that are in short-supply and high-demand for use in permanent magnets and modern electronic applications such as electric vehicles and wind turbines (i.e: neodymium (Nd), praseodymium (Pr), dysprosium (Dy) and terbium (Tb)).
To ensure safe work conditions are met for the workforce, the Company has developed exploration guidelines that comply with the Saskatchewan Public Health Orders and the Public Health Order Respecting the
About Appia
Appia is a Canadian publicly-listed company in the uranium and rare earth element sectors. The Company is currently focusing on delineating high-grade critical rare earth elements, gallium and uranium on the
Appia has 119.6 million common shares outstanding, 142.2 million shares fully diluted.
Cautionary Note Regarding Forward-Looking Statements: This News Release contains forward-looking statements which are typically preceded by, followed by or including the words 'believes', 'expects', 'anticipates', 'estimates', 'intends', 'plans' or similar expressions. Forward-looking statements are not a guarantee of future performance as they involve risks, uncertainties and assumptions. We do not intend and do not assume any obligation to update these forward- looking statements and shareholders are cautioned not to put undue reliance on such statements.
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Email: appia@appiaenergy.ca
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